BirdAnalyst
Species · Alabama · BBS 2025 Release · 1966–2024

Mottled Duck Population Trend in Alabama

All statesWaterfowl

Mottled Duck in Alabama has declined: down 33% on the route-weighted index since 1992.

-33%Since 1992TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
3Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
15YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Mottled Duck Trends in AlabamaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Mottled Duck in Alabama. See the full index history below.

Mottled Duck Survey Routes in Alabama

Routes recording Mottled Duck in Alabama.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Dauphin Is119861986
Chacaloochee Bay120162014
Dauphin Is 2120141991

Mottled Duck Population Trend in Other States

arkansasfloridakansaslouisianamississippisouth-carolinatexas

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.